Onions are used for a lot of things besides just cooking . It's also used for getting rid of colds cuts and ear aches but what a lot of people don't know is that the juice from the onion is good for hair growth . what you do is put the onion in a juicer or mash it up and applying onion juice on your scalp and  massage it on your scalp and keep it on head for 3mins and wash it out with shampoo. You keep doing this remedy for a 6 months; this remedy helps active your hair follicles or another way is to consuming onions .